3. A car travelling at 90kph requires 55m to stop after the brakes have been applied. Determine the slope of the road surface of the average coefficient of friction is 0.50.

3. A building is located 8.8 m from the centerline of the inside lane of a curved section of highway whose radius is 145 m. the road is level and e is equal to 0.10. Determine the maximum possible design speed. Assume the longitudinal and lateral coefficients of friction are equal to 0.35 and 0.13, respectively. Ensure you check speed for both stopping sight distance and vehicle stability. Assume a standard perception-reaction time of 2.5sec.

4. The rear-wheel-drive pickup truck, with its center of gravity at G, is to negotiate a bump from a standing start in the position shown. The static and kinetic coefficients of friction between the tires and the pavement are 0.18 and 0.15, respectively. Determine the largest slope angle 0 that can be negotiated, assuming that the drive wheels are (a) spinning; and (b) not spinning. 12 in. 60 in. 40 in.

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